7287287 has 4 divisors (see below), whose sum is σ = 8328336. Its totient is φ = 6246240.

The previous prime is 7287281. The next prime is 7287289. The reversal of 7287287 is 7827827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7827827 = 7 ⋅1118261.

It is not a de Polignac number, because 7287287 - 2¹⁴ = 7270903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7287281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520514 + ... + 520527.

It is an arithmetic number, because the mean of its divisors is an integer number (2082084).

Almost surely, 2^7287287 is an apocalyptic number.

7287287 is a deficient number, since it is larger than the sum of its proper divisors (1041049).

7287287 is a wasteful number, since it uses less digits than its factorization.

7287287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041048.

The product of its digits is 87808, while the sum is 41.

The square root of 7287287 is about 2699.4975458407. The cubic root of 7287287 is about 193.8750656974.

The spelling of 7287287 in words is "seven million, two hundred eighty-seven thousand, two hundred eighty-seven".